Ignition-timer for internal-combustion engines.



F. C. MASON L G. L. SINTZ. IGNITION' TIMER EUR INTERNAL GOMBUSTION ENGINESL APPLICATION FILED 001226, 1906.

Patented Dec. l5, 1908.

wim/Lewes @Hof/neig narran srarnsrersi FRANCIS C. MASON AND GUY L, SINTZ, OF GRAND RAPIDS, MICHIGAN, ASSIGNGRS, BY DRECT ann Mnsnn AssreNMnNrs, To NORMAN W.

CHAMBERLN, OF GRAND RAPIDSQVICBIGAN.

IGNITION-TIMER, FOR NTERNALCOMBSTEON ENGINES.'

Specification of Letters Patent.

I Patentes nes. is, isos.

Application filed October 26, 1906. Serial No. 340,710.

To all whom' it may concern.'

`Be it known that we, Farmers C. Mason and GUY L. SIN'rz, each being a citizen of the 'United States of Aincrioafresiding at Grand Rapids, in the county of Kent and State of ldiohigan, have invented certain new and useful Improvements in ignition-Timers for internal-Combustion Engines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in ignition timers, for internal Combustion engines, the charge in which is fired by electric spark mechanism 5 and its object is to 'rovide reliable device for simultaneously a( justing the time of the ignition in a number of cylin ders; to provide a reliable devine for the purpose, not lilrely to get out of order, and to provide the same with various nea7 and useful features hereinafter more fully described and partieularly pointed out in the claims.

Our device consists essentially of a rotating hea-d arranged transversely of a shaft and adapted to rotate synchronously With the engine, and having a transversely movable member provided with a roliing contact to successively' close the electric circuits that operate the .tiring mechanism, said rotating head being ineiosed in a case, Within which is a-ring of insulating material traversed by said rolling contact and in which atregular intervals is inserted the terminals of the elec trie ci rouits, said terminals being spaced apart Cri Uur invention further consists in the par-- tisular arrangement and combination of these various features whereby the same are not likely to become Wornyto get out of order, er to become displaced or loosened by the vibration and impact ofthe Contact, and in the various details of construction and arrangeimmt hereinafter more fully described, as wili more fully appear by reference to the acooinpanying drawings, in which:

.nais to which the various eleetrie cirer Figure l. is a front elevation of adevioe embodying our invention with parts broken aivayto show the construction; Fig. 2. vertical section of the same on the line 2 2 .of Fig. i. A

Lilie numbers refer to like parts in both of the figures.

'i represents a'cylindrical ease elosed at the front by a transparent disk 2, preferably of mica, and detachably securedY in place by means of a scre f' threaded rin 3. The back ofthe oase is closed and provided with a boss Li forming a bearing in which is journaied a short shaft 5 having a socket at its outer end to receive anyoonnecting .means to rotate the shaft synchronously with the movement of the engine and in proper time to perform one revolution of this shaft to each complete cycle of operation .of the engine. 6 is a screwthreaded stem inserted in the inner end of this shaft on which stein and Within the oase, is a transverse tubular head 7 in which is mounted the longitudinally movable shank 8 of a yoke 9 in which yoke is journaled a roll ing contact i8, which Contact traverses the interior of a ring is of insulating material preferably of hard fiber,` inserted in the Nase and contacting the interior of the same. At equal intervals on this ease are radiai bosses 15 equal in number to the numb ir of the oylinders of the engine, four being shown. .ln these bosses are inserted tubos i9 of insulating material and engaging the outer ends the bosses are insulatingsvashers 2G. Termiattached are inserted in the of these bosses and consist of metallic bolts 16 having heads 17 embedded in the insulating ring and projecting slightly therefrom on the inner surface of the same. These bolts are proyided on their outer ends with am nuts '18 between whieh the wires of the respective circuits (not shown) areconnected to the bolts. These boltsv also serve to securely hold the parte in place-- Ari arm 2i on the i serves to hold the saine from rotating and to adjust the case about the axis of the shaft 5, which adjustment determines the earlier or later Contact Yof the roller i3 with the heads i7 of the terminals. A rod 22 eonnects the arm with suitable adiusting means. A sprinT i0 surrounds the sha-ni; Q- and y-ieldin, f gly forces the roller ivi-th the inner surface of are this shank engages and traverses the head 7 an thus maintains the axis of the roller 13 parallel With the axis of the shaft.

The disk 2 serves to inclose and protect the various parts Ifrom dust orother outside interference With its operation. It Will benoted that the terminals contacted by the vroller 13 are embedded inf the insulating material and are not likely'to be displaced or 'loosened by the hammering ac-` tion due to the rapid rotation of the roller around the interior ofthe case. So also all` the insulating material is firmly'clampedin place by the jam nuts on the outer end ofthe belts 16 and thus secured against any looseness 0r displacement by any variation due to the contact of the roller 13 with the terminals and insulation. This rollingcontact is not likely to Wear and will follow anyirregularity or depression of the heads 17 of the bolts or terminals and also is less likely to produce sparks and burning of the electrodes.

What We claim is: l Y

1. In a timer for electric ignition devices, a rotative shaft having a socket at its inner end and an attaching 'socket at its outer end, a transverse tubular head having a reduced portion formed :to provide a stem for engagev ment in the inner socket of said shaft and also having a longitudinal slot, a yoke having a stem slidable in the heada pin in theyoke and slidably engaging the slot in the head, a

a slot 12 in an insulating ring surrounding the head and traversed by the rolling contact, a casing 1nclosing the head and ring, means for 'adjust- 'nuts on the outer end ofthe terminals to con'- nect Wires thereto and to hold the parts in place. l l2. In a timer for electric ignition devices, a rotative shaft havinga socket at'eachend, a tubular head having a stem fitted in the inner socket of saidshaft and also havino' la longitudinal slot,ia yoke having a stem szlidabdle in the head, a pin carried by the yoke'and slidably engaging the slot in the head, a spring having connectionwith the stem ofthe yoke and adapted to force the latter away from the hollow head, a contact carried by the yoke, an insulating ring surrounding the head and traversed by the contact, a casing inclosing t e head and ring, means foga adjusting the c si` g aboutthe axis of the shaft, an

illsextendingV through the ringA and,

termina casing and having 'heads at their inner ends embedded in the ring and 'engaged by -said contact.

In testimony whereof We affix our signa-l tures in presence of two Witnesses.V

FRANCIS c` MASON.

GUY L. SINTZ.

Witnesses: n

LUTHER V. MOULTON, GnoneiANA GRACE. c 

